Resolution and Swath
Spatial and Spectral Resolutions
The surface area measured on the ground and represented by an individual pixel, is termed as the spatial resolution. For SENTINEL-2, there are three possible spatial resolutions (see Table 1).
Spectral resolution is defined as a measure of ability to resolve features in the electromagnetic spectrum. SENTINEL-2 spectral resolutions (Bandwidth) are provided in Table 1.
Table 1: Wavelengths and Bandwidths of the 3 Spatial Resolutions of the MSI instruments
Radiometric resolution is a measure of the ability of an imaging system to record different levels of brightness or tone. The radiometric resolution of SENTINEL-2 is 12-bit. This gives a potential range of brightness levels from 0 - 4 095.
Temporal resolution is the amount of time, expressed in days, that elapses before a satellite revisits a particular point on the Earth's surface. The satellites in the SENTINEL-2 constellation will provide a revisit time of 5 days at the equator in cloud-free conditions.
The swath width of SENTINEL-2 is 290 km. In comparison, the swath width of LANDSAT 5 TM and LANDSAT 7 ETM+ is 185 km, and the swath width of SPOT-5 is 120 km.